No, definitely not. Though the young ones seem to be better at playing outside, as long as you can keep them from getting hooked on video games for a while. Not that I'm blaming video games totally--I had them when I was a kid, and still spent a lot of time outside. Today it seems to be different for a lot of kids though...
As a new father (5 month old), it is good to see some of the kids in my cul-de-sac (dead end street) still get together and kick around a footy or have a game of cricket. But this is an uncommon sight in the large city where i live.
I feel that time pressures and parents' desire for their children to succeed in today's world, puts less emphasis on having fun with friends and playing and more on after school tuition, music lessons, homework etc.
Asian people, Chinese and Korean in particular, are fanatical about their children succeeding academically thus the phenomenon of the "Tiger Mother". Imho these children are robbed of their childhood on the proviso that they will be financially successful one day, by studying and getting into the right college course (ie medicine, dentistry, law).